<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        body{
            background-color: black;
        }
        .card {
            position:absolute;
            top: 200px;
            left: 200px;
            width: 350px;
            margin: 50px auto;
            box-shadow: 0 30px 50px 0 rgba(221, 201, 201, 0.2);
            border-radius: 15px;
        }

        .head {
            width: 350px;
            height: 200px;
            border-radius: 15px 15px 0 0;
            margin-bottom: 50px;
            background-image: linear-gradient(135deg, rgb(71, 56, 73) 0%, rgb(24, 9, 26) 100%);
        }
        .former{
            padding: 30px 20px;
        }
    </style>
</head>
<body>
    <div class="card">
        <div class="head"></div>
        <div class="former">
            <!-- 表单留白 -->
        </div>
    </div>
</body>
</html>